Thermal conditioning system

Abstract

A thermal conditioning system including a heat-transfer circuit, a refrigerant circuit including successively: a compressor, a first bi-fluid exchanger and a second bi-fluid exchanger arranged jointly on the refrigerant circuit and on a main loop of the heat-transfer circuit, a first expansion valve, a third bi-fluid exchanger arranged jointly on the refrigerant circuit and on a secondary loop of the heat-transfer circuit, a first branch of the heat-transfer circuit being configured so that the heat-transfer liquid leaving the first bi-fluid exchanger returns to the first bi-fluid exchanger without passing through the second bi-fluid exchanger, and including a second heat exchanger configured to exchange with a second air flow. A second branch connects the first branch to the main loop, and includes a third heat exchanger configured to exchange with the second air flow.

What is claimed is: 
     
       1. A thermal conditioning system comprising:
 a heat-transfer liquid circuit including: 
 
       a main circulation loop, a secondary loop, a first branch and a second branch,
 a refrigerant fluid circuit including a main loop for circulation of refrigerant fluid having the following in succession in a direction of circulation of the refrigerant fluid:
 a compression device, 
 a first bifluid exchanger arranged both on the refrigerant fluid circuit and on the main loop of the heat-transfer liquid circuit so as to enable an exchange of heat between the refrigerant fluid and the heat-transfer liquid in the main loop, 
 a second bifluid exchanger arranged both on the refrigerant fluid circuit and on the main loop of the heat-transfer liquid circuit so as to enable an exchange of heat between the refrigerant fluid and the heat-transfer liquid in the main loop, 
 a first expansion device, 
 a third bifluid exchanger arranged both on the refrigerant fluid circuit and on the secondary loop of the heat-transfer liquid circuit so as to enable an exchange of heat between the refrigerant fluid and the heat-transfer liquid in the secondary loop, 
 
 
       wherein the first branch of the heat-transfer liquid circuit links a first connection point disposed on the main loop to a second connection point disposed on the main loop, the first branch being configured such that the heat-transfer liquid at the outlet of the first bifluid exchanger returns to an inlet of the first bifluid exchanger without passing through the second bifluid exchanger, the first branch having a second heat exchanger configured to exchange heat with a second air stream, and 
       wherein the second branch of the heat-transfer liquid circuit links a third connection point disposed on the first branch downstream of the second heat exchanger to a fourth connection point disposed on the main loop upstream of the second bifluid exchanger, 
       the second branch having a third heat exchanger configured to exchange heat with the second air stream. 
     
     
       2. The thermal conditioning system as claimed in  claim 1 , wherein the main loop of the heat-transfer liquid circuit has a first heat exchanger configured to exchange heat with a first air stream. 
     
     
       3. The thermal conditioning system as claimed in  claim 2 , wherein the first air stream is an air stream internal to an interior of a motor vehicle, and wherein the second air stream is an air stream external to an interior of the vehicle. 
     
     
       4. The thermal conditioning system as claimed in  claim 1 , wherein the third heat exchanger is disposed upstream of the second heat exchanger in a direction of flow of the second air stream. 
     
     
       5. The thermal conditioning system as claimed in  claim 1 , wherein the third bifluid exchanger is configured to be thermally coupled to a first element of an electric powertrain of a motor vehicle. 
     
     
       6. The thermal conditioning system as claimed in  claim 1 , wherein the refrigerant fluid circuit has a first bypass branch linking a first junction point disposed on the main loop downstream of the second bifluid exchanger and upstream of the third bifluid exchanger to a second junction point disposed on the main loop downstream of the third bifluid exchanger and upstream of the compression device, the first bypass branch having a fourth bifluid exchanger configured to be thermally coupled to a second element of an electric powertrain of the vehicle. 
     
     
       7. The thermal conditioning system as claimed in  claim 6 , wherein the main loop of the refrigerant fluid circuit has a refrigerant fluid accumulation device disposed downstream of the third bifluid exchanger and upstream of the second junction point. 
     
     
       8. The thermal conditioning system as claimed in  claim 6 , wherein the refrigerant fluid circuit has a second bypass branch linking a third junction point disposed on the main loop downstream of the second bifluid exchanger and upstream of the first junction point to a fourth junction point disposed on the main loop downstream of the third bifluid exchanger and upstream of the second junction point, the second bypass branch having the following in succession: a third expansion device and a fourth heat exchanger configured to exchange heat with the first air stream. 
     
     
       9. The thermal conditioning system as claimed in  claim 8 , wherein the refrigerant fluid circuit has a fourth bypass branch linking a seventh junction point disposed on the main loop downstream of the fourth junction point and upstream of the compression device to an eighth junction point disposed on the third bypass branch downstream of the fifth junction point and upstream of the fifth heat exchanger, wherein the refrigerant fluid circuit has a fifth bypass branch linking a ninth junction point disposed on the main loop downstream of the third junction point and upstream of the third bifluid exchanger to a tenth junction point disposed on the third bypass branch downstream of the fifth heat exchanger and upstream of the sixth junction point, and wherein the fifth bypass branch has a fourth expansion device. 
     
     
       10. The thermal conditioning system as claimed in  claim 6 , having a casing which defines a receiving volume, wherein the main loop of the refrigerant fluid circuit is inside the casing, and wherein the first bypass branch of the refrigerant fluid circuit is inside the casing. 
     
     
       11. The thermal conditioning system as claimed in  claim 10 , wherein the second bypass branch of the refrigerant fluid circuit has a first portion inside the casing, wherein the casing has a first inlet/outlet for refrigerant fluid, the first portion linking the third junction point and the ninth inlet/outlet, and wherein the second bypass branch of the refrigerant fluid circuit has a second portion inside the casing, wherein the casing has a second inlet/outlet for refrigerant fluid, the second portion linking the fourth junction point and the second inlet/outlet. 
     
     
       12. The thermal conditioning system as claimed in  claim 1 , wherein the refrigerant fluid circuit has a third bypass branch linking a fifth junction point disposed on the main loop downstream of the compression device and upstream of the second bifluid exchanger to a sixth junction point disposed on the main loop downstream of the fifth junction point, the third bypass branch having a fifth heat exchanger configured to exchange heat with the second air stream. 
     
     
       13. The thermal conditioning system as claimed in  claim 1 , wherein the main loop of the refrigerant fluid circuit includes a sixth heat exchanger disposed upstream of the first expansion device, the sixth heat exchanger being configured to exchange heat with the first air stream. 
     
     
       14. The thermal conditioning system as claimed in  claim 1 , wherein the refrigerant fluid circuit has a sixth bypass branch linking an eleventh junction point disposed on the main loop upstream of the first bifluid exchanger to a twelfth junction point disposed on the main loop downstream of the second bifluid exchanger, and wherein the sixth bypass branch includes a sixth heat exchanger configured to exchange heat with the first air stream. 
     
     
       15. The thermal conditioning system as claimed in  claim 10 , wherein the main loop of the heat-transfer liquid circuit has a fifth portion inside the casing, wherein the casing has a fifth inlet/outlet for heat-transfer liquid and a sixth inlet/outlet for heat-transfer liquid, the fifth portion linking the fifth inlet/outlet and the sixth inlet/outlet, wherein the first bifluid exchanger and the second bifluid exchanger are disposed on the fifth portion, wherein the first branch of the heat-transfer liquid circuit has a sixth portion inside the casing, and wherein the casing has a seventh inlet/outlet for heat-transfer liquid, the sixth portion linking the seventh inlet/outlet and the second connection point.